Run it on low. The gun operates at 100psi pumped by a tiny regulator (not so tiny tiny, but pretty small compared to most guns) so anything above 400-500 psi would be excessive pressure putting more force on it than it can properly handle.
best way to adjust the adjustable regulator on my ninja 68/4500 to a low/mid pressure? im looking into a clone 5. my vanquish 2.0 says it can be run no problems on the stock pressure in a ninja bottle so i never have bothered to adjust it.